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EC-64 < SYSTEM DESCRIPTION > [QR25DE] DIAGNOSIS SYSTEM (ECM) Calculated load value: (Calculated load value in the freeze frame data) x (1 ±0.1) [%] Engine coolant temperature condition: • When the freeze frame data shows lower than 70 °C (158°F), engine coolant temperature should be lower than 70 °C (158°F). • When the freeze frame data shows higher than or equal to 70 °C (158°F), engine coolant temperature should be higher than or equal to 70 °C (158°F). NOTE: • When the same malfunction is detected regardless of the above vehicle conditions, reset the counter of driv- ing pattern C. • When the above conditions are satisfied without detecting the same malfunction, reset the counter of driving pattern C. • The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC is stored in ECM. DRIVING PATTERN D Driving pattern D means a trip satisfying the following conditions. • The state of driving at 40 km/h (25 MPH) reaches 300 seconds or more in total. • Idle speed lasts 30 seconds or more. • A lapse of 600 seconds or more after engine start. NOTE: • When the same malfunction is detected regardless of driving conditions, reset the counter of driving pattern D. • When the above conditions are satisfied without detecting the same malfunction, reset the counter of driving pattern D. DIAGNOSIS DESCRIPTION : System Readiness Test (SRT) Code INFOID:0000000011277881 System Readiness Test (SRT) code is specified in Service $01 of SAE J1979/ISO 15031-5. As part of an enhanced emissions test for Inspection & Maintenance (I/M), certain states require the status of SRT be used to indicate whether the ECM has completed self-diagnosis of major emission systems and com- ponents. Completion must be verified in order for the emissions inspection to proceed. If a vehicle is rejected for a State emissions inspection due to one or more SRT items indicating “INCMP”, use the information in this Service Manual to set the SRT to “CMPLT”. In most cases the ECM will automatically complete its self-diagnosis cycle during normal usage, and the SRT status will indicate “CMPLT” for each application system. Once set as “CMPLT”, the SRT status remains “CMPLT” until the self-diagnosis memory is erased. Occasionally, certain portions of the self-diagnostic test may not be completed as a result of the customer's normal driving pattern; the SRT will indicate “INCMP” for these items. NOTE: The SRT will also indicate “INCMP” if the self-diagnosis memory is erased for any reason or if the ECM mem- ory power supply is interrupted for several hours. If, during the state emissions inspection, the SRT indicates “CMPLT” for all test items, the inspector will con- tinue with the emissions test. However, if the SRT indicates “INCMP” for one or more of the SRT items the vehicle is returned to the customer untested. NOTE: If permanent DTC is stored or MIL illuminates during the state emissions inspection, the vehicle is also returned to the customer untested even though the SRT indicates “CMPLT” for all test items. therefore, it is important to check SRT (“CMPLT”), DTC (No DTCs) and permanent DTC (No permanent DTC) before the inspection. SRT SET TIMING SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is done regardless of whether the result is OK or NG. The set timing is different between OK and NG results and is shown in the table below. |